Don't buy anything. Use the stuff your friend has, under his supervision. IF you have problems, then start looking at other solutions.
With the loads you are likely to shoot I don't think much of this concern about bullet pulling is going to happen. That 3.3 pound gun is going to slow down a LOT of the recoil. Your target load generates this for recoil:
Recoil Energy of 12 foot pounds, and Recoil Velocity of 16 fps.
That's NOTHING. my .45 Super loads recoil about that much. When you start getting bullet pull is with heavier loads, or a much lighter gun.
For instance my 360PD Scandium has bullet pull issues. It gives you numbers like this:
148 grains 1131 fps:
Recoil Energy of 19 foot pounds, and Recoil Velocity of 40 fps.
Notice the VERY high Recoil velocity. This is what pulls bullets. It's the gun accelerating suddenly, and slamming the remaining rounds around.
Even at that speed, no bullet pull issues. Those start happening with full power .357 loads, like 158's at 1591 fps(thats the load data, I don't get that in my snubbie)
Recoil Energy of 43 foot pounds, and Recoil Velocity of 61 fps.
I shot one round, unloaded the gun, and went back to something that wouldn't cut my finger and break my wrist.
If I heavy load my .500 Linebaugh Maximum, 525's at 1550 fps, I get these numbers:
Recoil Energy of 71 foot pounds, and Recoil Velocity of 36 fps.
My gun is near the same weight as yours, and as you can see it's really hard to get the gun moving near as fast as some of the light guns.
What I'm trying to say is I don't see much you can load in your gun that's going to pull bullets.
In my old Seville the most I ever shot was 360 grains at 1550 fps:
Recoil Energy of 40 foot pounds, and Recoil Velocity of 28 fps.
Even that didn't pull bullets. Those rounds loaded in .45 Colt brass, with .45 Colt dies.
If you run 260's with H110, at Max velocity 1954 fps, at 51,600 CUP
you get:
Recoil Energy of 37 foot pounds, and Recoil Velocity of 27 fps.
That's STILL not bullet pull area in your gun, unless you really limp wrist it and just let the gun go.
I used to fill the .45 Colt case with H110, load a 230 grain super hard cast ball on top, and go plinking.
This load would run about 1900-2000 fps. While I would have liked a LFN
type bullet, I always thought this load would work for bears, deer, mountain lions or drug guys in our mountains.
That bit of insanity NEVER pulled a bullet, and I was loading with a Dillon 550 and standard .45 colt dies.
To put it simple:
Don't throw away money you don't have to for something that isn't going to happen.